package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class JDBCDemo9 {
    public static void main(String[] args) {
        try(Connection connection = DBUtil.getConnection();) {

            connection.setAutoCommit(false);

            String sql = "UPDATE user " +
                         "SET password=?,nickname=?,age=? " +
                         "WHERE id =? ";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,"666666");
            ps.setString(2,"老三");
            ps.setInt(3,50);
            ps.setInt(4,2);
            int num =ps.executeUpdate();
            System.out.println(num>0?"修改成功！":"修改失败！");

            connection.commit();
            System.out.println("事务提交了，修改算数！");
//            connection.rollback();
//            System.out.println("事务回滚了，修改不算数！");
        } catch (SQLException e) {
           e.printStackTrace();
        }
    }
}
